That’s going to bring up the template customization page. In the upper left hand corner, you’ll see this:

Once that is done, beneath the above posted menu you can scroll down. Do so until you find this:

DON’T FORGET TO CLICK SAVE!!!

Now comes the fun part, making that image static. Click on the Edit HTML button.

This is going to split your screen, with your blog showing below and the code window at the top. Don’t freak out. Scroll down through the code until you find these lines:

Now, where you see the green word ‘repeat’, replace that with ‘fixed’. It should now look like this:

DON’T FORGET TO HIT SAVE!

Okay, so as you’ll notice in the screenshot above there’s a drop down menu with the word Blog selected. In order to assure that your background is fixed for all your pages you have to select that drop down and repeat the code change for each one listed: